Re: Network very very slow... was iSCSI and jumbo frames

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

Michael van Elst a écrit :
> On Fri, Feb 05, 2021 at 01:49:12PM +0100, BERTRAND Joël wrote:
>>
>> First test : CPUfreq=3400 MHz
>> legendre# dd if=/dev/zero of=/dev/sd1 bs=1m count=10000
>> 10000+0 records in
>> 10000+0 records out
>> 10485760000 bytes transferred in 71.937 secs (145763098 bytes/sec)
>>
>> Second one : estd is kept with its standard configuration.
>> CPUfreq seems to stay at 800 MHz.
>> legendre# dd if=/dev/zero of=/dev/sd1 bs=1m count=10000
>> 10000+0 records in
>> 10000+0 records out
>> 10485760000 bytes transferred in 79.456 secs (131969391 bytes/sec)
> 
> Again, don't use the block devices for testing with dd. Use the
> block devices only for mounting a filesystem.
> 

	I beg your pardon, I have forgotten. But even if dd is done over block
device, throughput is correct without network.